How many hours a day should I revise?

The honest numbers

There is no magic figure, but there is a sensible range - and it is smaller than the scary numbers people post online.

Why more hours stops working

Learning happens when your brain retrieves - pulls an answer out under its own steam. Retrieval is tiring, and after a few focused hours the quality collapses: you drift into rereading and highlighting, which feel like work but change very little. Two sharp hours of answering questions beat six foggy hours of turning pages, every time.

Breaks are part of the method, not a guilty pause in it. A short walk, food, or half an hour completely off lets the next session actually count.

Someone online says they do eight hours a day

Someone online always does. Hour-counts posted on forums are unverifiable, usually exaggerated, and even when true they mostly describe time at a desk, not time learning. Comparing your revision to a stranger's numbers is a fast route to feeling behind while learning nothing new. Measure the only thing that matters: can you answer questions today that you could not answer last week?

How to tell your hours are working

Test, don't trust. End each session by answering two or three questions from memory. If you can, the session worked. If you can't, the fix is not a longer session tomorrow - it is a different method: fewer notes, more questions.